Rate of Reaction

Quiz by Chong Siew Juin

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10 questions
• Q1
Which is the correct unit for rate of reaction?
mols-1
dm3mol-1
Jmol-1
gdm-3
20s
• Q2
The reaction between excess magnesium ribbon and sulphuric acid produces 36cm3 hydrogen gas in 20s. The reaction completes in 2 minutes and the maxiumum volume of hydrogen gas obtained is 80cm3. What is the average rate of reaction at 20s?
4.00 cm3s-1
1.80 cm3s-1
0.67 cm3s-1
0.3 cm3s-1
60s
• Q3
Which of the following reactions has the highest rate of reaction?
excess magnesium powder + 25 cm3 0.2 moldm-3 hydrchloric acid
excess magnesium powder + 25cm3 of 0.5 moldm-3 hydrchloric acid
Excess magnesium ribbon + 25cm3 of 0.5moldm-3 hydrochloric acid
Excess magnesium ribbon + 25 cm3 of 0.5 moldm-3 hydrochloric acid
45s
• Q4
The following measures can be taken to reduce pollutants from automative industry except?
use catalytic converter in cars
use hyvrid cars
use hydrogen fuel cars
30s
• Q5
Which statement best explains the meaning of the term effective collision?
Collision that occurs when particles of reactants collide with one another in the correct orientationa
collision that causes chemical reaction to occur
Collision that causes the formation of new bonds
collision that occur at a very high temperature
30s
• Q6
Na2S2O3(aq) + H2SO4(aq) --> Na2SO4(aq) + S(s) + SO2(g) + H2O(l) Which of the following is the most suitable method to determine the rate of reaction?
Determine the volume of water produced with time
Determine the production of a fixed quantity of sulphur precipitate with time
Determine the change in the concentration of sodium sulphate with time
Determine the change in temperature of the solution with time
60s
• Q7
Which reaction has the highest rate of reaction?
Rusting of water pipe
Formation of stalactites and stalagmites in a cave
Photosynthesis in green plant
Burning of a small piece of charcoa
30s
• Q8
Diagram below shows a graph of the volume of gas released against time for a reaction between calcium carbonate, CaCO3 and hydrochloric acid, HCl. What is the mass of calcium carbonate used in the reaction? [Molar volume of gas = 24dm3 mol-1 at room conditions; RAM: C=12, O=16, Ca=40]
0.14g
0.40g
2.00g
0.20g
60s
• Q9
Table below shows the volume of carbon dioxide gas released at half minutes intervals when hydrochloric acid reacts with marble chips. What is the average rate of reaction in the second minute?
340.0 cm3 min-1
170.0 cm3 min-1
220.0 cm3 min-1
80.0 cm3 min-1
120s
• Q10
The following equation represents a reaction between 40cm3 of 0.5moldm-3 nitric acid and excess calcium carbonate. The time taken for the reaction to complete is 360s. 2HNO3 + CaCO3  Ca(NO3)2 + CO2 + H2O What is the average rate of reaction? [Molar volume of gas = 24dm3 mol-1 at room conditions]
0.055cm3s-1
1.333 cm3s-1
0.111 cm3s-1
0.667 cm3s-1
60s

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